Display screen or portion thereof with icon



FIG. 1 is a front view of a display screen or portion thereof with icon showing my new design;

FIG. 2 is a front view of a second embodiment thereof; and,

FIG. 3 is a front view of a third embodiment thereof.

The broken line showing in all views of a display screen or portion thereof and the dash dot lines within the icon form no part of the claimed design. 

The ornamental design for a display screen or portion thereof with icon, as shown and described. 